/Engine/Plugins/Experimental/TextToSpeech/Source/TextToSpeech/Public/TextToSpeechEngineSubsystem.h
Unmutes a text to speech channel so vocalized strings are audible on the channel. If the requested channel is already unmuted, nothing will happen.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=TextToSpeech) void UnmuteChannel ( [FName](API\Runtime\Core\UObject\FName) InChannelId )